The culture of normal human pharyngeal isthmus should have normal oral flora without pathogenic bacteria growth. Pharyngeal bacteria are from the outside world, under normal circumstances, it is not pathogenic, but in the body's whole body or local resistance decline and other external factors can lead to infection and other diseases. Therefore, bacterial culture of throat swab can isolate pathogenic bacteria, which is helpful for the diagnosis of diphtheria, suppurative tonsillitis and acute pharyngitis.







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